/Engine/Source/Runtime/Engine/Public/MaterialHLSLTree.h
class FExpressionParameter : public [UE::HLSLTree::FExpression](API\Runtime\Engine\HLSLTree\FExpression)
FGuid
ExternalTextureGuid
FMaterialParame...
ParameterInfo
FMaterialParame...
ParameterMeta
EMaterialSample...
TextureSamplerType